Peter, Olivia and Walter are trapped in a town from which there is no escape during a mysterious Fringe event

Astrid gets a surprise visit from her counterpart in the alternate universe; Peter and Olivia are on the trail of a killer equipped with a toxic weapon that defies chronological description.

Olivia is preoccupied by a warning from the Observers, while Peter helps with the search for a girl with mysterious powers to see the future.

The alternate Fringe division confronts a powerful new adversary during Peter's visit to the other side

Peter takes a dangerous journey to the alternate universe to confront Walternate, while Olivia hears an ominous prediction from an Observer.

The Fringe team find that the mysterious death of a man—and his corpse turning white—is not unprecedented and may be linked to an unknown genetic disorder. Meanwhile, Olivia is plagued by migraines.

An electrical engineer (Stephen Root) and his wife (Romy Rosemont), a theoretical physicist, pitch in during a frantic search for a pattern between time-loop anomalies.

The threatening return of the translucent shape-shifters coincides with the reemergence of a former Massive Dynamic scientist (Arye Gross). Meanwhile, Walter gets a visit in the lab from Nina Sharp.

Olivia is awakened by a mysterious energy in her apartment

When two 12-year-old kids bully another boy, they are found dead and in just hours after dying their bodies are shockingly in an advanced state of decomposition. As the Fringe team investigates the mysterious case, they ...

The Fringe teams work together when a serial killer "over there" builds an impressive body count, but the case takes an interesting turn after the murderer's alternate identity "over here," a forensic psychologist, is br...

Just one week after Peter Bishop saved the day and was then wiped from existence, the truce between the two worlds remains intact and the two sides are forced to work together. Lincoln Lee joins the Fringe team as they i...

The third season concludes with Peter meeting his destiny head-on and the demise of a team member

Olivia teams up with Sam Weiss (Kevin Corrigan) on a mission of utmost importance.

Walternate's thirst for revenge drives him to cause trouble in the other universe

The team desperately tries to remove William Bell's consciousness from Olivia's body before she disappears forever.

Life "over there" becomes more intense as Olivia finds herself in great danger.

While investigating an apparent suicide, the Fringe team encounters a woman with uncanny characteristics.

The team investigates a group of thieves who are able to break the laws of gravity; Walter attempts to delay the damage he has caused.

Revisiting an intense period in the lives of the Bishops and Olivia.

The team is led to the home of a grieving widow; Peter and Olivia try to fix their relationship.

A terrorist ``over there'' arms himself with an insect that enjoys human flesh; alternate Olivia is reunited with her boyfriend; despite remaining determined to save his world, Walternate discovers there are lines he won...

A scientist dies after ingesting a cloud of blue powder that disintegrates his bones; a person from Walter's past reluctantly agrees to help with the investigation.

Walter worries about Peter after observing Massive Dynamic's assembly of the doomsday device; an intense investigation begins after a dead body is discovered.

The team works with an observer to fix a mistake; Walter befriends someone he admires.

The team investigates when a man has his heart extracted; Peter tries to come to terms with the reality of his relationship with Olivia.

Peter struggles to cope with recent events; Olivia searches for an ally; a device that communicates between universes is discovered.

An emotional and familiar case hits home for Broyles; Olivia reunites with Henry to enlist his services on a covert mission to return home.

Fifteen people along the Eastern seaboard suffer retrograde amnesia after listening to their shortwave radios on the same frequency; the anticipation of Olivia's return escalates.

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A shapeshifter is called into action; Walter finds himself in a dangerous situation during an investigation at Massive Dynamic.

The team races to investigate a series of anomalous events; Secretary Bishop shares his plan with Col. Broyles; Olivia struggles with a heart-stopping vision.

The team investigates when people are discovered in a trancelike state that ultimately leads to death; Walter meets with Nina at Massive Dynamic.

fights to find her way home; Peter and Walter try to move on with their lives alongside alternate .

Sacrifices will be made and both universes may never be the same again after Walter and Olivia visit the “other side”

Olivia travels to the parallel universe with Walter, who faces-off with William Bell

Peter teams up with Sheriff Mathis on a mysterious murder case; Walter faces the possibility of being sent back to St. Claire's; someone from the ``other side'' visits.

Walter deals with upsetting news and tells Olivia's niece a fairy tale.that includes musical performances by Olivia and Agent Broyles.

A shape-shifting embryo is discovered; Peter shares a family secret with Olivia.

While investigating the mysterious deaths of passengers on a commuter train, Peter remains suspicious of Walter; the investigation leads the team to a a very powerful man (Peter Weller).

A perfectly healthy woman inexplicably dies; Olivia tries to keep Walter's secret from Peter.

Walter flashes back to 1985 while explaining 's otherworldly origins to Olivia. Also, 's mother is introduced, and details of the neighboring world reaffirms that there is more than one of everything.

When the sole survivor of a building demolished by an earthquake in downtown Manhattan proves to be from the other Earth, Walter leads the team to , the source of a related experiment that he and William conducted years ...

Unseen killers target a wedding with a toxin that targets specific individuals, and Walter discovers that the case may be tied to a branch on the Bishop family tree.

When a man enters an office in Boston for a meeting, he becomes disoriented and collapses, only to have his veins erupt and spray blood everywhere. Shortly after Olivia and Peter arrive at the scene to investigate the bi...

The team investigates a small town in upstate New York where disfigured people attempt to hide themselves.

After a teenage girl is pronounced brain dead she mysteriously reawakens, seemingly with the mind of a high-ranking Russian soldier.
NOTE*SPOILER*: This episode was written for season 1, but did not air, do not get...

During the investigation of strange circumstances surrounding brain surgeries at a mental hospital, Olivia finds a reason to believe the leader of the shape-shifters may have something to do with it. Leonard Nimoy guest ...

When a Chinese cargo ship runs aground, an investigation reveals it was carrying human freight that served as hosts for a squid-like parasite, but time becomes an issue as the case unfolds with increasingly sinister impl...

A peculiar abduction occurs in Boston, leading the Fringe team to uncover details of the mysterious man known as The Observer. While the bizarre case takes center stage, Walter (John Noble), Peter (Joshua Jackson) and As...

When a kidnapping rapidly escalates into a hostage situation in New York, local authorities close in on the suspects only to discover that an unknowable force has mind-blowing consequences. The investigation intensifies ...

Emmy Award winner Jon Cassar (24) directs as the Fringe Division takes on a puzzling investigation of victims who inexplicably disintegrate into ash. The shadowy case casts light on Special Agent Phillip Broyles’ ...

The Fringe team travels cross-country to Seattle after learning of a mysterious incident involving a man who attacked his boss because he believed he was an evil ram-horned creature. As these puzzling occurrences continu...

Agent Dunham, still recovering from her traumatic visit to the alternate reality, is given a concoction by Walter to help her remember. Another woman being experimented on by Walter is introduced. Meanwhile the Fringe te...

Peter, Olivia, and Walter race against time to investigate the bombing of a train station. Walter discovers something unusual about the human remains.

The Fringe team travels to Pennsylvania to investigate an underground tunnel full of human remains. Meanwhile, Walter experiments using frogs to travel between realities.

Season two opens with Olivia's shocking return to this perplexing alternate reality, while Peter is unknowingly in a race against time with an ominous mobile force pursuing information about Olivia's visit.
Walter ...

Someone close to Fringe Division is attacked, and bioterrorist David Robert Jones returns. Meanwhile, Walter disappears inexplicably.

Olivia has some bad dreams that end up coming true, and then begins seeing visions while awake that aren't really there. She uses these visions to help solve the case of a woman who spontaneously combusted.

Someone is killing people and draining their spinal cord fluid. Olivia, Peter, and Walter go to great lengths to stop the deaths, which are happening more and more frequently.

A suicide incident occurs at Grand Central Station, which Olivia dreams about. Meanwhile, shocking details emerge about the ZFT manuscript.

An animal-rights organization's rescue mission at a laboratory backfires when it releases a vicious beast, almost mythological in appearance with a lion's body and eagle's talons, and Charlie is in danger of being its la...

Olivia makes a bond with a mysterious child that was living alone underground. Meanwhile, a serial killer reemerges.

The German authorities interrogate Olivia in an attempt to locate Mr. Jones. Meanwhile, the team investigates a bizarre series of incidents where the victims' facial orifices close over, leaving them faceless corpses.

Olivia and Peter go undercover to investigate after the discovery of bizarre remains at a jumbo jet's crash site.

Olivia, Walter and Peter are brought in to try and stop a killer with the ability to liquefy the human brain.

The FBI and an increasingly desperate Peter search for the abducted Olivia... unaware that the man heading the investigation is the one responsible for her disappearance.

The team is called in to investigate a bank robbery when one of the thieves is found embedded in a solid wall. Walter believes they're after something of his, but things take a turn for the worse when the thieves ambush ...

A Massive Dynamic employee leaps to his death after hallucinating a butterfly attack. Agent Scott proves useful in investigating the case, but a frustrated Olivia wants to remove him from her consciousness once and for a...

Walter's former bunkmate at the mental institute is linked to the abduction of a young musical prodigy by a serial kidnapper. Peter is concerned when Walter insists on going back to the mental institute to solve the case...

A parasite mysteriously latches onto a dying FBI agent's internal organs. Agent Dunham rushes to Germany to meet a prisoner for information about the threat they face.

The team investigates a woman that re-appears after weeks of being missing, with a rare disease and she inexplicably causes pain and death to the people she meets. In the investigation dangerous level of radiation are de...

The team investigate the case of a man who can generate electrical phenomena... and is at the center of a series of strange deaths involving electronic devices.

The team investigates a strange cylinder, found in a deadly explosion at a construction site in New York City. The cylinder was in the middle of the explosion and was completely unharmed. Olivia uncovers a correlation be...

The team investigates a bus full of dead commuters that appear to be fossilized and uncover a man who has visions of pattern-related disturbances before they happen; Dr. Bishop requests a piano in the lab to help him pro...

Olivia, along with Peter and Walter Bishop, investigates the strange death of a woman who had an even stranger child. The woman was pregnant for only hours, yet the baby she birthed was fully developed - and also aged ei...

When all the passengers on a plane die, FBI agent Olivia Dunham investigates the events and her partner almost dies. A desperate Olivia looks for help from Dr. Walter Bishop who has been institutionalized. Olivia, Dr. Bi...